Trying to sell some Steem-Engine tokens

I know this is the Hive blockchain, and Steem is kind of not important here. But most of us still have some Steem left in our wallets, and most also have loads of Steem-Engine tokens. Now, I am having issues with that. Since a few days I can't transact anymore via Steem Keychain. It sends the transaction to broadcast and then it is just stuck. I am tied with my hands together now, when it comes to Steem. I can't send any tokens, I can't power up or power down... It really sucks, because it would be nice to buy some more Hive right now with that Steem, as Hive has taken a drop the last days.

Does anyone have a clue, how I can fix this problem?

Sincerely,

Pele23